On 08/20/2014 03:54 AM, Thomas Wood wrote:
kmstest_edid_add_3d adds an EDID extension block with 3D support to a
copy of the specified EDID.
Signed-off-by: Thomas Wood <thomas.wood@xxxxxxxxx>
---
lib/igt_kms.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
lib/igt_kms.h | 1 +
2 files changed, 81 insertions(+)
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index a414d96..eb898f8 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -657,6 +657,86 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
}
/**
+ * kmstest_edid_add_3d:
+ * @edid: an existing valid edid block
+ * @length: length of @edid
+ * @new_edid_ptr: pointer to where the new edid will be placed
+ * @new_length: pointer to the size of the new edid
+ *
+ * Makes a copy of an existing edid block and adds an extension indicating
+ * stereo 3D capabilities.
+ */
+void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
+ unsigned char *new_edid_ptr[], size_t *new_length)
+{
+ unsigned char *new_edid;
+ int n_extensions;
+ char sum = 0;
+ int pos;
+ int i;
+ char cea_header_len = 4, video_block_len = 6, vsdb_block_len = 11;
+
+ igt_assert(new_edid_ptr != NULL && new_length != NULL);
+
+ *new_length = length + 128;
+
+ new_edid = calloc(*new_length, sizeof(char));
+ memcpy(new_edid, edid, length);
+ *new_edid_ptr = new_edid;
+
+ n_extensions = new_edid[126];
+ n_extensions++;
+ new_edid[126] = n_extensions;
+
+ /* recompute checksum */
+ for (i = 0; i < 127; i++) {
+ sum = sum + new_edid[i];
+ }
+ new_edid[127] = 256 - sum;
+
+ /* add a cea-861 extension block */
+ pos = length;
+ new_edid[pos++] = 0x2;
+ new_edid[pos++] = 0x3;
+ new_edid[pos++] = cea_header_len + video_block_len + vsdb_block_len;
+ new_edid[pos++] = 0x0;
+
+ /* video block (id | length) */
+ new_edid[pos++] = 2 << 5 | (video_block_len - 1);
+ new_edid[pos++] = 32 | 0x80; /* 1080p @ 24Hz | (native)*/
+ new_edid[pos++] = 5; /* 1080i @ 60Hz */
+ new_edid[pos++] = 20; /* 1080i @ 50Hz */
+ new_edid[pos++] = 4; /* 720p @ 60Hz*/
+ new_edid[pos++] = 19; /* 720p @ 50Hz*/
+
+ /* vsdb block ( id | length ) */
+ new_edid[pos++] = 3 << 5 | (vsdb_block_len - 1);
+ /* registration id */
+ new_edid[pos++] = 0x3;
+ new_edid[pos++] = 0xc;
+ new_edid[pos++] = 0x0;
+ /* source physical address */
+ new_edid[pos++] = 0x0;
+ new_edid[pos++] = 0x0;
A CEC SPA of 0.0.0.0 is actually invalid and may cause issues with the
EDID decoder. Suggest since this is dummy VSDB make the SPA 1.0.0.0.
Clint
+ /* Supports_AI ... etc */
+ new_edid[pos++] = 0x00;
+ /* Max TMDS Clock */
+ new_edid[pos++] = 0x00;
+ /* Latency present, HDMI Video Present */
+ new_edid[pos++] = 0x20;
+ /* HDMI Video */
+ new_edid[pos++] = 0x80;
+ new_edid[pos++] = 0x00;
+
+ /* checksum */
+ sum = 0;
+ for (i = 0; i < 127; i++) {
+ sum = sum + new_edid[length + i];
+ }
+ new_edid[length + 127] = 256 - sum;
+}
+
+/**
* kmstest_unset_all_crtcs:
* @drm_fd: the DRM fd
* @resources: libdrm resources pointer
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 4263a01..921afef 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -149,6 +149,7 @@ enum kmstest_generic_edid {
bool kmstest_force_connector(int fd, drmModeConnector *connector,
enum kmstest_force_connector_state state);
+void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
const unsigned char *edid, size_t length);
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